The SPDIF Cable is connected to the motherboard as shown below:

The SPDIF connection on the EVGA P55 Classified 200 Motherboard (E659) is circled in red below:

The SPDIF connection on the EVGA P55 FTW 200 Motherboard (E658) is circled in red below:

The SPDIF connection on the EVGA P55 FTW Motherboard (E657) is circled in red below:

The SPDIF connection on the EVGA P55 Motherboard (E655) is circled in red below:

The SPDIF connection on the EVGA P55 LE Motherboard (E653) is circled in red below:

The SPDIF connection on the EVGA P55 Micro Motherboard (E652) is circled in red below:

The SPDIF connection on the EVGA P55 V Motherboard (E650) is circled in red below: